Considerations and limitations for group tables

You must take into account the following when you configure group tables for OpenFlow flows.

For configuring group tables

  • RUCKUS ICX devices support all group types in the OpenFlow v1.3.0 specification.
  • Multiple actions are supported by a group. The following packet modifications are supported through these actions for group types Indirect, Select and Fast failover.
    1. Modify a VLAN
    2. Modify the source MAC address
    3. Modify the destination MAC address
    4. Decrement the TTL
    5. Pop VLAN
  • Each action bucket can have only one output port.
  • Each OpenFlow port can be a part of any number of groups.
  • A group entry can include ports from different slots and ports with different speeds.
  • Group tables are not impacted based on the OpenFlow type on the interface (Layer 2 or Layer 3 or Layer23 and hybrid interfaces).
  • To disable OpenFlow on interfaces, the interface must be removed from any group entry first.

Limitations

For configuring OpenFlow, consider the following limitations.

  • Watch_group is not supported in Fast failover group type.
  • PBR or Transparent VLAN flooding cannot be configured along with the group table, when OpenFlow v1.3.0 is enabled and vice versa.

The following additional limitations apply to the specific group types.

For group All

To multicast flow-matching traffic to all action buckets, all action buckets are executed every time for the group All.

  • A packet is replicated for the output port in each bucket. Only one packet is processed for each bucket of the group.

For group Indirect

The group Indirect executes one defined action bucket in a group. Only one action bucket can exist and it is executed every time.

Group Indirect supports one and only one bucket in each group entry.

For group Select

To load balance flow-matching traffic to all action buckets, one of the action buckets is chosen each time for the group Select.

  • Weighted load balancing for group Select is not supported.
  • Group chaining is not supported.
  • Individual bucket statistics are not supported.

For group Fast failover

The group Fast failover executes the first live bucket. Each action bucket associated with a specific port or group determines the liveness of the bucket.

  • The buckets are selected in the defined sequence.
  • On a stack unit Fast failover, traffic convergence takes up to 3 seconds.
  • If no buckets are live, packets are dropped.
Parent topic: Group table